In amplitude modulation, sinusoidal carrier frequency used is denoted by $\omega_c$ and the signal frequency is denoted by $\omega _m$ The bandwidth $(\Delta \omega _m)$ of the signal is such that $\Delta \omega_m << \omega_c$ . Which of the following frequencies is not contained in the modulated wave ?

Question

$\begin{array}{1 1} (1)\;\omega _m \\ (2)\; \omega_c \\(3)\; \omega_m+\omega_c \\ (4) \omega_c - \omega_m \end{array}$